/**
 * Copyright (c) 1997-2013, www.tinygroup.org (luo_guo@icloud.com).
 * <p/>
 * Licensed under the GPL, Version 3.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.gnu.org/licenses/gpl.html
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.tinygroup.tinysqldsl.expression.relational;

import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;
import org.tinygroup.tinysqldsl.expression.BinaryExpression;
import org.tinygroup.tinysqldsl.expression.Expression;

public class LikeExpression extends BinaryExpression {

	private String escape = null;

	public LikeExpression(Expression leftExpression,
			Expression rightExpression, boolean not) {
		super(leftExpression, rightExpression, not);
	}

	public LikeExpression(Expression leftExpression, Expression rightExpression) {
		super(leftExpression, rightExpression);
	}

	public String getStringExpression() {
		return ((isNot()) ? "NOT " : "") + "LIKE";
	}

	public String toString() {
		String retval = super.toString();
		if (escape != null) {
			retval += " ESCAPE " + "'" + escape + "'";
		}

		return retval;
	}

	public String getEscape() {
		return escape;
	}

	public void setEscape(String escape) {
		this.escape = escape;
	}

	public void builderExpression(StatementSqlBuilder builder) {
		builder.visitBinaryExpression(this, " LIKE ");
		StringBuilder buffer = builder.getStringBuilder();
		String escape = getEscape();
		if (escape != null) {
			buffer.append(" ESCAPE '").append(escape).append('\'');
		}
	}
}
